git-mit: unpin libgit2

pkgs/applications/version-management/git-mit/default.nix

@@ -2,7 +2,7 @@
 , rustPlatform
 , fetchFromGitHub
 , pkg-config
-, libgit2_1_5
+, libgit2
 , openssl
 , zlib
 , stdenv
@@ -28,13 +28,17 @@ rustPlatform.buildRustPackage {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [
-    libgit2_1_5
+    libgit2
     openssl
     zlib
   ] ++ lib.optionals stdenv.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
   ];
 
+  env = {
+    LIBGIT2_NO_VENDOR = 1;
+  };
+
   meta = with lib; {
     description = "Minimalist set of hooks to aid pairing and link commits to issues";
     homepage = "https://github.com/PurpleBooth/git-mit";